Contents  on 6 March '08

Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

NEOCP Activity  on 6 March '08

The MPC's NEO Confirmation Page has 17 listings: 4 new, 13 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and thirteen updated listings. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 23 objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 6 March '08

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been seven MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-E58 - "19:11 UT" - Comets C/2008 D1, 2008 D2, 2008 D3, 2008 D4 (STEREO)


MPEC 2008-E57 - "15:52 UT" - 2008 EP6


MPEC 2008-E56 - "15:49 UT" - 2008 EO6


MPEC 2008-E55 - "15:46 UT" - 2008 EN6


MPEC 2008-E54 - "15:42 UT" - 2008 EM6


MPEC 2008-E53 - "15:38 UT" - 2008 EL6


<< DOU on 6 Mar. '08 >>  MPEC 2008-E52 - "07:09 UT" - Daily Orbit Update

Observers  on 6 March '08

A total of 22 observing facilities appear in today's MPECs.

CodeObserver / observatory
6581Dave Balam via 1.8m Plaskett Telescope in British Columbia, 1 in MPEC 2008-E56 -- 2008 EO6
703Catalina Sky Survey (CSS) in Arizona, 7 in MPEC 2008-E52 -- 2007 YK, 53789, 24443, 144922, 9856, 5836, 3691
151Eschenberg Obs. in Switzerland, 2 in MPEC 2008-E52 -- 2008 EL, 2002 TD66
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-E52 -- 2008 DJ
A17Guidestar Obs. in Germany, 2 in MPEC 2008-E52 -- 2008 EK1, 2008 AF4
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2008-E52 -- 2008 CL1, 2005 EK70
246KLENOT in the Czech Republic, 10 in MPEC 2008-E52 -- 2008 EL, 2008 EK1, 2008 EJ, 2008 EG, 2008 DL4, 2008 DJ, 2008 DG5, 2008 DC, 2008 DA4, 2008 CR118
704LINEAR in New Mexico, 11 in MPECs 2008-E52, 2008-E53 & 2008-E56 -- 2008 EO6, 2008 EL6, 2008 DW, 2008 DK5, 2008 DG4, 2008 CS116, 2008 CL1, 2004 CR2, 86324, 18736, 175921
699LONEOS in Arizona, 2 in MPEC 2008-E52 -- 2007 TU24, 153591
A80Lindenberg Obs. in Germany, 3 in MPEC 2008-E52 -- 2008 EK1, 2008 CL72, 2007 TG8
130Lumezzane Obs. in Italy, 13 in MPEC 2008-E52 -- 2008 DJ, 2008 DG17, 2008 CP116, 2008 BT18, 2007 TU24, 2007 RX19, 2006 DU62, 2005 EA, 2000 DP107, 2000 DK8, 54686, 175921, 138127
711McDonald Obs. in Texas, 14 in MPEC 2008-E52 -- 2008 EX5, 2008 EV5, 2008 EE, 2008 DY, 2008 DG5, 2008 CR118, 2008 CL72, 2008 AF4, 2006 SU131, 2004 NC9, 2003 TM1, 2003 AD1, 2002 RU25, 2000 DP107
474Mt. John Obs. in New Zealand, 3 in MPECs 2008-E53, 2008-E56 & 2008-E57 -- 2008 EP6, 2008 EO6, 2008 EL6
G96Mt. Lemmon Survey (MLS) in Arizona, 20 in MPECs 2008-E52, 2008-E54, 2008-E55 & 2008-E57 -- 2008 ES5, 2008 ER, 2008 EQ, 2008 EP6, 2008 EN6, 2008 EM6, 2008 EH, 2008 EE5, 2008 DW22, 2008 DL5, 2008 DJ, 2008 DH5, 2008 DG4, 2008 DA4, 2008 CL1, 86819, 162422, 138175, 137084, 3908
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 15 in MPEC 2008-E52 -- 2008 EP, 2008 EL, 2008 EK1, 2008 DJ, 2008 CZ118, 2008 CS116, 2008 CN1, 2008 CL1, 2008 CD22, 2008 CB22, 2008 AE, 2005 EK70, 2005 BE2, 2002 TD66, 11398
C491SECCHI HI1-A instrument aboard STEREO-A in heliocentric orbit leading Earth, 4 in MPEC 2008-E58 -- C/2008 D4, C/2008 D3, C/2008 D2, C/2008 D1
C492SECCHI COR2-A instrument aboard STEREO-A in heliocentric orbit leading Earth, 1 in MPEC 2008-E58 -- C/2008 D3
C502SECCHI COR2-B instrument aboard STEREO-B in heliocentric orbit trailing Earth, 1 in MPEC 2008-E58 -- C/2008 D3
B61Sant Cugat del Valles Obs., 1 in MPEC 2008-E52 -- 1620
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2008-E52 & 2008-E57 -- 2008 EP6, 2008 EJ1, 2008 CG119
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-E52 -- 2007 RV9
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2008-E52, 2008-E54 & 2008-E55 -- 2008 EN6, 2008 EM6, 2008 EK1, 2008 DW, 2008 DL5, 2008 DK5, 2008 CQ1
A97Stammersdorf Obs. in Austria, 2 in MPEC 2008-E52 -- 1685, 1620

Impact Risk Monitoring  on 6 March '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2008 EL6JPL Sentry2333208216.9e-09-6.04-6.040JPL: "Analysis based on 14 observations spanning 1.4200 days (2008-Mar-05.10843 to 2008-Mar-06.52847)." Diameter approximately 0.290 km. from mean, weighted H=20.4.
2008 EX5NEODyS20312016-20905174.88e-05-3.91-4.920NEODyS: "Based on 18 optical observations (of which 1 are rejected as outliers) from 2008/03/04.396 to 2008/03/05.424."
JPL Sentry18572010-21077057.0e-05-3.68-4.950JPL: "Analysis based on 17 observations spanning 1.0276 days (2008-Mar-04.39523 to 2008-Mar-05.42279)." Diameter approximately 0.055 km. from mean, weighted H=23.9.
2008 EV5JPL Sentry20032015-21073245.7e-06-2.76-3.400JPL: "Analysis based on 17 observations spanning .90313 days (2008-Mar-04.21432 to 2008-Mar-05.11745)." Diameter approximately 0.332 km. from mean, weighted H=20.0.
NEODyS19322017-2087261.89e-07-4.23-4.580NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2008/03/04.215 to 2008/03/05.118."
2008 EE5JPL Sentry21302013-21073738.1e-07-2.75-3.550JPL: "Analysis based on 15 observations spanning .93949 days (2008-Mar-04.17185 to 2008-Mar-05.11134)." Diameter approximately 0.482 km. from mean, weighted H=19.2.
NEODyS15452013-2090541.02e-07-3.55-4.230NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/03/04.173 to 2008/03/05.112."
2008 EK1JPL Sentry2333R E M O V E DJPL: Risk listing removed at 2245 UTC.
NEODyS1544R E M O V E D
2008 ERNEODyS1544R E M O V E D
2008 EHJPL Sentry2130R E M O V E DJPL: Risk listing removed at 2035 UTC.
NEODyS1544R E M O V E D
2008 DW22JPL Sentry2333R E M O V E DJPL: Risk listing removed at 2322 UTC.
2008 DA4JPL Sentry2333210011.8e-07-6.53-6.530JPL: "Analysis based on 44 observations spanning 7.7031 days (2008-Feb-27.28072 to 2008-Mar-05.98381)." Diameter approximately 0.056 km. from mean, weighted H=23.9.
NEODyS1544R E M O V E D
2008 AF4JPL Sentry23332078-210074.0e-05-2.08-2.181JPL: "Analysis based on 566 observations spanning 55.459 days (2008-Jan-10.39652 to 2008-Mar-05.85535)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
NEODyS23332078-208923.03e-05-2.18-2.181NEODyS: "Based on 570 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/03/05.856. NOTE: The Virtual Impactor in 2089/01/09.480 in the table above is rated as Torino Scale 1."

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

Chronology  on 6 March '08

Times are UTC for when items were noted or added by The Tracking News.

2333Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Noted that JPL Sentry has updated its 2008 DA4 risk assessment - see above
Noted that JPL Sentry has removed 2008 DW22 as an impact risk - see above
Noted that JPL Sentry has removed 2008 EK1 as an impact risk - see above
Noted that JPL Sentry has posted 2008 EL6 as an impact risk - see above
2130Noted that JPL Sentry has updated its 2008 EE5 risk assessment - see above
Noted that JPL Sentry has removed 2008 EH as an impact risk - see above
2030Noted that NEODyS has posted 2008 EX5 as an impact risk - see above
Grabbed MPEC 2008-E58 - Comets C/2008 D1, 2008 D2, 2008 D3, 2008 D4 (STEREO) - see above
2003Noted that JPL Sentry has posted 2008 EV5 as an impact risk - see above
1931Noted that NEODyS has posted 2008 EV5 as an impact risk - see above
1857Noted that JPL Sentry has posted 2008 EX5 as an impact risk - see above
1625Grabbed MPEC 2008-E55 - 2008 EN6 - see above
Grabbed MPEC 2008-E56 - 2008 EO6 - see above
Grabbed MPEC 2008-E57 - 2008 EP6 - see above
1545Noted that NEODyS has updated its 2008 EE5 risk assessment - see above
Grabbed MPEC 2008-E52 - Daily Orbit Update - see above
1544Noted that NEODyS has removed 2008 DA4 as an impact risk - see above
Noted that NEODyS has removed 2008 EH as an impact risk - see above
Noted that NEODyS has removed 2008 EK1 as an impact risk - see above
Noted that NEODyS has removed 2008 ER as an impact risk - see above
Grabbed MPEC 2008-E53 - 2008 EL6 - see above
Grabbed MPEC 2008-E54 - 2008 EM6 - see above